Spectra

Word SPECTRA
Character 7
Hyphenation N/A
Pronunciations N/A

Definitions and meanings of "Spectra"

What do we mean by spectra?

Plural of spectrum. noun

Plural form of spectrum. noun

A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.

Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc.

The autism spectrum.

The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).

The set of eigenvalues of a matrix.

Of a bounded linear operator A, the set of scalar values λ such that the operator A—λI, where I denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.

(abstract algebra) The set, denoted Spec(R), of all prime ideals of a given ring R, commonly augmented with a Zariski topology and considered as a topological space.

Specter, apparition.

The image of something seen that persists after the eyes are closed.

Synonyms and Antonyms for Spectra

  • Synonyms for spectra
  • Spectra synonyms not found!!!
  • Antonyms for spectra
  • Spectra antonyms not found!

The word "spectra" in example sentences

These ocular spectra are of four kinds: 1st, Such as are owing to a less sensibility of a defined part of the retina; or _spectra from defect of sensibility. _ 2d, Such as are owing to a greater sensibility of a defined part of the retina; or _spectra from excess of sensibility_. 3d, Such as resemble their object in its colour as well as form; which may be termed ❋ Erasmus Darwin (1766)

The plans spectra& spectra plus offer global life insurance coverage and global payout. ❋ Unknown (2009)

_Of direct and inverse spectra existing at the same time_; _of reciprocal direct spectra_; _of a combination of direct and inverse spectra_; _of a spectral halo_; _rules to pre-determine the colours of spectra_.a. When an area, about six inches square, of bright pink Indian paper, had been viewed on an area, about a foot square, of white writing paper, the internal spectrum in the closed eye was green, being the reverse spectrum of the pink paper; and the external spectrum was pink, being the direct spectrum of the pink paper. ❋ Erasmus Darwin (1766)

The European Space Agency, the European Southern Observatory, and NASA just released a free Photoshop plug-in that gives anyone access to archival astronomical images and spectra from the Hubble Space Telescope, the Spitzer Space Telescope, and others: ❋ Unknown (2004)

Such waves are therefore well suited to the study of fine details in spectra, which, though observable by optical spectroscopy, could not be measured with satisfactory precision by this method. ❋ Unknown (1972)

The scarcity of spectra was a reason for regulating broadcast television, then the Internet came along with its unlimited spectra, which is why it remains generally unregulatedputting aside the issue of the recent auctions of 3G spectra. ❋ Unknown (2009)

To conclude, I find in Scripture that there be angels and spirits, good and evil; but not that they are incorporeal, as are the apparitions men see in the dark, or in a dream or vision, which the Latins call spectra, and took for demons. ❋ Unknown (2007)

The characteristic feature of their spectra is the strength and breadth of the hydrogen lines and the extreme faintness of the metallic lines. ❋ George Forbes (1892)

That in these experiments the colours of the spectra are the reverse of the colours which occasioned them, may be seen by examining the third figure in ❋ Erasmus Darwin (1766)

Sometimes the form of the spectrum, when it has been received from a circular luminous body, will become oblong; and sometimes it will be divided into two circular spectra, which is not owing to our changing the angle made by the two optic axises, according to the distance of the clouds or other bodies to which the spectrum is supposed to be contiguous, but to other causes mentioned in No.X. 3. of this section. ❋ Erasmus Darwin (1766)

By moving the lips and the throat move, our bodies transform that pitch into a complicated pattern of many simultaneous sounds with different pitches -- which can be seen on a diagram called a spectra that shows how loud all the different sound frequencies in our speech are. ❋ Unknown (2009)

But at distances of many light years the signals, from light wavelength patterns called spectra, are very faint and difficult to read. ❋ Unknown (2009)

Combining the rate, and amplitude of pulsation with other information, such as spectra, which reveals what the composition of the star is we obtain information on the internal structure of stars. ❋ Unknown (2010)

Well, I suspect that there's a large portion of the thermal IR spectra which is so saturated by water vapor that even in what we'd call very arid areas it will still be saturated by what little water there is. ❋ Unknown (2006)

a chemical element with each other, with respect to their magnetic resolution, and on investigating the connection between this resolution and the regular relationships existing in spectra. ❋ Unknown (1967)

Assessment Criteria: Diagrams of communication links and modulators, simulated/calculated results and performances such as spectra (frequency domain), waveforms (time domain), bandwidth, power and SNR, analysis and discussions of results Detailed Requirements: Use Matlab®/Simulink® to design a communication link for AM audio broadcasting. ❋ UniHertsECandEE (2010)

The team analyzed the HRV "spectra" of the electrocardiograms (ECG) of forty two healthy male volunteers who are non-yogic practitioners, and forty two who are experienced practitioners, all volunteers were aged between 18 and 48 years. ❋ Unknown (2009)

Cross Reference for Spectra

  • Spectra cross reference not found!

What does spectra mean?

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